Constanz schmitz



(No Model.)

V 0. SOH'MITZ. VESSEL FOR CONTAINING LIQUID GASES.

$10,597,024 Patented Jan. 11,1898.

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UNITED STATES CONSTANZ SOHMITZ, OF BERLIN, GERMANY.

VESSEL FOR CONTAINING LIQUID GASES.

SPECIFICATION forming part of Letters Patent No. 597,024, dated January 11, 1898.

Application filed May 11, 1897.

T0 all whom it may concern:

Be it known that I, CONSTANZ SOHMITZ, a

subject of the King of Prussia, residing at Berlin,in the Kingdom of Prussia, German Empire, have invented-new and useful Improvements in Cans, Bottles, or Vessels for Oontainin g Liquid Gases, of which the following is a specification.

Accidents happening through the explosion of bottles, cans, or vessels containing liquid gases in all cases arise only from their being filled too full, so that the liquid in expanding by heat bursts the can, owing to there being no gas-space therein.

As the expansion coefficient of most liquid gases is sufficiently well known, it can be readily determined to what extent a can can be filled, in order to insure that atthe maximum temperature that can occur there shall always remain a gas-space. This degree of filling is even at present prescribed and marked on the cans. rst,

W'hen filling the cans, the extent of filling is determined by weighing. Independently of the possibility oferrors occurring in weighing, the specific gravity of the charge may vary, owing to the presence of impurites, so hat a charge of equal weight may occupy a varying space, and thus it is impossible to insure that the exact free gas-space necessary shall be left.

When discharging liquid gas from the cans-for instance, in working refrigerating machineryit is often desirable to draw oif a definite quantity, such as five kilos, from a can containing twenty kilos. This has also hitherto been determinedby subsequently weighing of the can, in which case it is quite a chance that the exact desired weight is withdrawn.

The present invention relates to improved means whereby, first, the bottles or cans are filled with liquid gas up to an accurately-determined gage-mark," so that under all circumstances a certain gas-space will be left in the vessel, and, secondly, an accurately-determined quantity of liquid gas can be withdrawn from the can. For this purpose I employ an arrangement which I will describe with reference to the accompanying drawings, in which- Figure 1 shows a vertical section of the -nels 8.

PATENT OFFICE.

Serial No- 636,079. (No model.)

head-piece of a bottle or can containing liquid gas, and Fig. 2 shows avertical section of the complete can to a smaller scale.

In the head-piece l, by means of which the valve is screwed into the vessel, there are fixed several tubes 2, of which by way of example four are shown on the drawings, the upper ends of which open into passages 33, formed in the head. These passages are arranged to be consecutively put in communication with a central passage 11,which leads. to the discharge-valve. In the arrangement shown by way of example in Fig.1 this communication is effected in the following manner.

The upper part of the head 1 is formed as the plug 4 of a cock, upon which can turn the cock barrel 5. According to the position given to this barrel a small channel 6, formed therein, establishes a communication between one of the passages 3 and a central passage 9 by means of an annular groove 7 and chan- It will be understood that in place of the groove 7 and passages S and 9 the channel 6 could be made to communicate directly with the space 10 between the plug and-b rel. The barrel is made to fit fluid-tight upon the plug by means of suitable packing. The space 10 communicates by means of passage 11 with the upper recessed part of the barrel, which is formed with an internal screw-thread, so that the casing of a shut-off valve of ordinary construction can be screwed into it, as shown. The tubes 2 are made of. difierent lengths, as shown at Fig. 2, extending down respectively to the marks a, b, c, and 01. Mark a is, for instance, the'height to which the can can be filled. Mark I) indicates one third, mark 0 two-thirds, and mark d the entire contents of the can.

The can is manipulated as follows: If the can is to be filled, the valve and barrel 5 ar turned around, so as to put passage 11 in com munication with the tube 2, extending tolevc a. This position can be indicated bya pointe 12, fixed to 5, which is brought to a mark (:01 responding to level a on the head 1. 'Whe I1 the can has been filled, it is placed in a W I tical position, and the valve isopened, so My to allow any excess of liquid that may have V entered beyond the level (L to escape, sucli liquid being forced out by the pressure in'the vessel through the short tube 2, channel 5,

and-passages 3, 0, and 11. As soon as the level of the liquid has sunk to the opening of the short tube 2 no more liquid can escape as such, but only vapor thereof, so that as soon as such vapor is seen to issue the valve is closed. If the discharge takes place into an inclosed space, so as not to be visible, the

moment at which vapor issues will be recognized by the formation of frost on the outer surface of the head 1 in consequence of the rapid absorption of heat by the contents of the can by the evaporation. This indication is more particularly adopted when the can forms part of a refrigerating apparatus and a certain proportion of its contents is to be discharged, in which case the valve-casing and barrel are previously turned to the corresponding tube 2.

The above-described improved construc- 1 tion also alfords the advantage that it is no longer necessary to invert the position of the can, so that the valve shall be at bottom for discharging, as is at present necessary.

I claim A bottle or can for containing liquid gases characterized by several tubes 2 of different lengths provided in the interior of the bottle or can and arranged. on the closure of the latter in such a manner, that each tube can be put in communication with the outlet-Valve for the purpose of filling the bottle or can without weighing up to an accurately-determined gage-mark or of withdrawing from the bottle or can an accurately-determined quantity of liquid gas substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

OONSTANZ SOHMITZ.

Vitnesses:

G. HiJ'LsMANN, W. HAUPT. 

